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High Performance Propulsion Engines

Industry-leading technology allows Caterpillar to create the most reliable commercial engines for a variety of applications. From tugs and container vessels to yachts and sport fishers, Cat and MaK engines have demonstrated their efficiency countless times. With remarkable reliability and durability, these engines will exceed your expectations for decades.

C12 ACERT™ High Performance Propulsion Engine

Cat® C12 ACERT Diesel Marine Propulsion Engines, with ratings of 669-715 mhp (660-705 bhp) at 2300 rpm, meet IMO II emission standards. The C12 takes full advantage of the electronically controlled unit injection fuel system, resulting in an environmentally friendly engine with outstanding performance and fuel economy. There is also a wide range of optional equipment available to meet the needs of your specific pleasure craft application.

  • Specification Summary

  • Power Range 660-705 bhp (492-526 bkW)
  • Speed Range 2300 rpm
  • Configuration In-line 6, 4-Stroke-Cycle Diesel
  • Aspiration TA

Product Details

Ratings

Power Range 660-705 bhp (492-526 bkW)

Engine

Speed Range 2300 rpm
Emissions IMO II
Aspiration TA
Bore 130.0 mm
Stroke 150.0 mm
Displacement 12.0 L
Rotation (from flywheel end) Counterclockwise
Configuration In-line 6, 4-Stroke-Cycle Diesel

Dimensions & Weights

Minimum Dry Weight 1174.0 kg
Maximum Length 1574.0 mm
Minimum Height 1005.0 mm
Maximum Width 969.0 mm
  • Air Inlet System
    •  Aftercooler - sea water; corrosion resistant, Air Cleaner/Fumes Disposal (closed system), Turbocharger, Jacket Water Cooled
  • Aftercooler - sea water; corrosion resistant, Air Cleaner/Fumes Disposal (closed system), Turbocharger, Jacket Water Cooled
    • Control System
      •  Electronic governing, Cold mode start strategy, Power compensation for fuel temperature, Programmable low idle, Electronic diagnostics and fault logging, Engine and transmission monitoring (speed, temperature, pressure), Fuel/air ratio control, Emergency s
    • Cooling System
      •  Thermostat and housing, Jacket water pump; gear driven, Sea water pump; rubber impeller; self-priming; gear-driven, Integral heat exhanger/expansion tank; removable tube bundle; replaceable copper-nickel tubes, Keel cooling - combined circuit (includes pip
    • Exhaust System
      •  Watercooled Manifold & Turbocharger
    • Flywheels & Flywheel Housings
      •  Flywheel; SAE No. 1; 113 teeth, Flywheel housing; SAE No. 1 (10 degree slant pad), SAE standard rotation
    • Fuel System
      •  Fuel filer; RH service on Port; LH service on Starboard, Fuel transfer pump, Fuel priming pump, Flexible fuel lines
    • Lube System
      •  Crankcase breather, Oil cooler, Oil filter; spin-on; RH service on Port; LH service on Starboard, Oil filler, Dipstick; RH service on Port; LH service on Starboard, Oil pump; gear driven
    • Crankcase breather, Oil cooler, Oil filter; spin-on; RH service on Port; LH service on Starboard, Oil filler, Dipstick; RH service on Port; LH service on Starboard, Oil pump; gear driven
      • Mounting System
        •  Front support
      • Power Take-Offs
        •  Hydraulic pump drive; SAE A; 11 tooth spline, 57 ft-lbs max torque; counterclockwise as viewed from the rear of hte engine looking into the pump drive and turns 1.41 x engine speed, Crankshaft pulley; 345 mm (13.6 in) single groove; 15.88 mm (.63in) width
      • Protection System
        •  Shutdown; electronic; 12 or 24 volt; energized to run
      • General
        •  Vibration damper, Lifting eyes, RH or LH service options, Literature, Variable engine wiring, Upper rear-facing customer wiring connector and ECAP connection, Electronic installation kit (connectors, pins, sockets)
      • Air Inlet System
        •  Low Profile Air Inlet Line, Shield (Air Inlet Line)
      • Charging System
        •  Charging Alternators, Voltmeter Guages, Voltmeter Guage Mounting, Alternator Mounting Group
      • Charging Alternators, Voltmeter Guages, Voltmeter Guage Mounting, Alternator Mounting Group
        • Cooling System
          •  Sea Water Pump, Coolant Recovery Tank, Flange Kit
        • Sea Water Pump, Coolant Recovery Tank, Flange Kit
          • Exhaust System
            •  Flexible Fitting, Elbow, Dry Elbow, Watercooled Elbow, Exhaust Connection, Exhaust Outlet Pipe, EXH Outlet Flange, Rain Cap, Muffler
          • Fuel System
            •  Fuel Cooler, Fuel Connections, Primary Fuel Filter, Primary Fuel/Water Separator
          • Instrumentation
            •  OEM Wiring Harness, Engine to Engine Harness, Digital Tachometer, Tachometer Mounting, Magnetic Pickup, RH 4 Hole Instrument Panel, LH 4 Hole Instrument, Marine Power Display System, Marine Power Display Unit (for additional monitoring stations), Marine Po
          • Lube System
            •  Manual sump pump, Transmission oil cooler
          • Manual sump pump, Transmission oil cooler
            • Mounting System
              •  Vibration Isolators
            • Vibration Isolators
              • Power Take-Offs
                •  Crankshaft Pulley, Front Stub Shaft, Front Stub Shaft & Pulley
              • Crankshaft Pulley, Front Stub Shaft, Front Stub Shaft & Pulley
                • Starting System
                  •  Air Pressure Regulator, Air Start Silencer, Start Switch, Jacket Water Heater, Battery sets (24 volt - dry)
                • Air Pressure Regulator, Air Start Silencer, Start Switch, Jacket Water Heater, Battery sets (24 volt - dry)
                  • General
                    •  Wiring Harness Removal, Belt Guard - Alternator, Belt Guard - Alternator Pulley, Filter Cover Kit
                  • Wiring Harness Removal, Belt Guard - Alternator, Belt Guard - Alternator Pulley, Filter Cover Kit
                    • Packing
                      •  Overseas Preservation, Engine Protective Cover, Storage Preservation, Export Packing
                    • Overseas Preservation, Engine Protective Cover, Storage Preservation, Export Packing
                      Built for it